How. Filming inside a landscape?
You are also starting out on a new adventure, and a very steep learning curve. If you don't already have it, you will need to gain an understanding of modelling, texturing, rigging, lighting, staging, sound/sound fx, pacing, composing, compositing, story structure, cinematic structure, and, and, and. Blender can do many things, and you have a lot to learn just for that. But consider you will also have to gain some mastery of other programs like audacity (for audio) and the gimp (for texturing/backgrounds) as well before you can, as you say it, prof animate in a little map.

I guess you need to do what every one of us has done, search for tutorials on what you need to know at the time. Why not start with the opening shot on your example there. Model a rock, some trees, flowers, and a little character like you already have. Then light your scene and set up the animated camera shot. All of these links are to tutorials I found with a single search, all leading to dozens of others that may fit your needs more.

I was going to suggest that you also try to track down the production files for Big Buck Bunny and study the blend files because that movie opens similarly to your example. But it seems that more and more of Blender is getting locked up behind paywalls. Even so, there are many good blend files still freely available that you can download, open up and study.

I hope I haven't put you off. But I think it will help you more to understand that you will never get to where you want to be (prof animate) by starting with a single animation and then asking SO how to do everything else.